Description
The PSS PRO Shaft Seal is a mechanical face seal utilizing our proven stainless steel and carbon sealing components, but adds a reinforced silicone bellow, a secondary shaft retention collar, 316 Stainless Steel hose clamps (rolled edges & non-perforated) and an optional Nitronic 50 rotor upgrade (for highly corrosive environments).
Designed specifically for applications that will require increased durability and resistance to harsh, corrosive, high pressure and otherwise demanding environments.
The PSS PRO Shaft Seal is a specialized mechanical seal that is suitable for a variety of applications, with unmatched performance.
PSS PRO Shaft Seal Compression Chart

Shaft Diameter (A) | Stern Tube Diameter (B) | Approx. Compressed Length (C) | (D) |
3/4″, 7/8″, 1″, 1-1/8″ | 1-1/4″, 1-1/2″, 1-3/4″, 2″, 2-1/4″ | 6.925″ – 7.05″ | 0.875″ |
3/4″, 7/8″, 1″, 1-1/8″ | 2-1/2″ | 8″ | 0.875″ |
1-1/4″, 1-3/8″ | 1-3/4″, 2″, 2-1/4″, 2-1/2″ | 8.055″ – 8.18″ | 2.875″ |
1-1/4″, 1-3/8″ | 2-3/4″, 3″, 3-1/4″, 3-1/2″ | 9.555″ – 9.743″ | 2.875″ |
1-1/2″, 1-9/16″, 1-3/4″, 2″ | 2″, 2-1/4″, 2-1/2″, 2-3/4″, 3″, 3-1/4″, 3-1/2″, 3-3/4″, 4″ | 7.842″ – 8.3305″ | 3.75″ |
2-1/4″, 2-1/2″ | 3-1/4″, 3-1/2″, 3-3/4″, 4″ | 8.675″ | 4.2″ |
2-1/4″, 2-1/2″ | 4-1/4″, 4-1/2″, 4-3/4″, 5″ | 8.8″ – 9.67″ | 4.2″ |
2-3/4″, 3″ | 4″, 4-1/4″, 4-1/2″, 4-3/4″, 5″, 5-1/4″, 5-1/2″, 5-3/4″, 6″ | 8.8″ – 9.988″ | 5″ |
3-1/4″, 3-1/2″, 3-5/8″, 3-3/4″ | 4-1/2″, 4-3/4″, 5″, 5-1/4″, 5-1/2″, 5-3/4″, 6″ |